Processes which occur without the addition or withdrawal of heat from the surrounding are called what?

Processes which occur without the addition or withdrawal of heat from the surrounding are called what?
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ANSWER: ADIABATIC
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Consider the following processes: [IES-1999] 1. Constant pressure heat addition. 2. Adiabatic compression. 3. Adiabatic expansion. 4. Constant pressure heat rejection. The correct sequence of these processes in Rankine cycle is: (a) 1, 2, 3, 4 (b) 2, 1, 4, 3 (c) 2, 1, 3, 4 (d) 1, 2, 4, 3

Description : Consider the following processes: [IES-1999] 1. Constant pressure heat addition. 2. Adiabatic compression. 3. Adiabatic expansion. 4. Constant pressure heat rejection. The correct sequence of these processes in Rankine cycle is: (a) 1, 2, 3, 4 (b) 2, 1, 4, 3 (c) 2, 1, 3, 4 (d) 1, 2, 4, 3

Last Answer : (c) 2, 1, 3, 4 

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Last Answer : (C) All the natural processes are reversible in nature

A malignant tumor a) gains access to the blood and lymphatic channels. By this mechanism, the tumor metastasizes to other areas of the body. b) demonstrates cells that are well-differentiated. Cells of malignant tumors are undifferentiated. c) is usually slow growing. Malignant tumors demonstrate variable rate of growth; however, the more anaplastic the tumor, the faster its growth. d) grows by expansion. A malignant tumor grows at the periphery and sends out processes that infiltrate and destroy surrounding tissues.

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Last Answer : a) gains access to the blood and lymphatic channels. By this mechanism, the tumor metastasizes to other areas of the body.

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______ is the cell organelle, in which the biochemical processes of respiration and energy production occur. (1) Mitochondria (2) Chloroplast (3) Ribosomes (4) Nucleus

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Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the (A) Surrounding temperature (B) Average temperature of the fin (C) Temperature of the fin end (D) Constant temperature equal to that of the base

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Value of Nusselt number [Nu = (hD/k)] for the heat transfer byconduction from a droplet or a spherical particle to a surrounding stagnant film is (A) 0.5 (B) 2 (C) 10 (D) 100

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The second law of thermodynamics states that (A) The energy change of a system undergoing any reversible process is zero (B) It is not possible to transfer heat from a lower temperature to a higher temperature (C) The total energy of system and surrounding remains the same (D) None of the above

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We feel cool when we sit near the fan, this is because – (1) fan gives cool air. (2) an cools surrounding air. (3) air vapourises the sweat on our body. (4) we feel cool when air touches the body.

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Last Answer : (3) air vapourises the sweat on our body. Explanation: We feel comfortable sitting under a fan when we are perspiring because a fan increases the rate of evaporation of sweat (or moisture) from our body and makes us feel cool and comfortable.

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We feel cool when we sit near the fan, this is because (1) fan gives cool air. (2) fan cools surrounding air. (3) air vapourises the sweat on our body. (4) we feel cool when air touches the body.

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Are there any circumstances where I can take an early withdrawal without penalty from a 401K retirement plan?

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If two processes occur at the same rate no net change occurs in the overall system?

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Following processes can occur across the cell membrane at the same time. a. Osmosis b. Active transport c. Both d. None of them

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Consider a system having ‘m’ resources of the same type. These resources are shared by three processes P1, P2 and P3 which have peak demands of 2, 5 and 7 resources respectively. For what value of ‘m’ deadlock will not occur? (A) 70 (B) 14 (C) 13 (D) 7

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